This is the Official Raspberry Pi 3B+ / 3B power supply for use in Canada and USA, manufactured by Raspberry Pi's official partner RS Components.

Compared to other power adapters outputting at 5V 2A, this official Pi 3 power adapter outputs at 5.1V 2.5A, providing more than enough power for Pi 3B+ / 3B to mount as many devices as you wish, so your Pi 3B+ / 3B will be stable even at full load.